Q: Are these posts nickel-free? PLEASE INCLUDE "nickel-free" or "contains nickel" to ALL your product listings, especially to earring findings, bracelets and chains. Thank you .
Q: Is the loop in the same direction as the post, front to back or is it parallel to the half ball?
Q: What is the base metal? And how long is the post?
Q: are these hypoallergenic?